You have to decide what you want the shield to do for you.Do you want maximum wind protection,view or the ability to raise up and down as necessary.
I have had the the Tulsa Extra Tall and the Tall and enjoyed both alot. Unfortunately,they are prone like most to scratch over time and I was tired of them being right on me,as they "lean" into the Drivers area.
I have installed a F 4 and am very pleased with it's performance.It was more expensive,but I was needing performance.The optice are great in any area,it protects the Rider better than the Tuksa Extra Tall,it raises up and down,but most of all it does not scratch the others and I can,if I want,use Rain X.Do not own stock in the company,just enjoy the performance ...opps almost forgot,it has the same OEM angle on the glass,staying out of your area and not hitting your helmet on it!